So I have a new baby bp. It's approximately 6-8 wks old and I weighed her for the first time today. She's 76g. Is that a normal weight for one her age? She seems thin to me because the circumference of her body is more triangular then round but I am not familiar with them when they're this young. I'm not worried about her because she's eating well and getting lots of fluids. I just want to know the normal range so I can measure progress.